M&P15-22 Flash hider

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Well, if you have an earlier model, with no flash suppressor - plain barrel and you don't want to remove your barrel and have it threaded: you could build or modify a flash suppressor for an "interference fit" onto your barrel. The ID of the suppressor would need to be .002 - .003 less than the OD of your barrel. Heat the supressor in an oven at about 450F and chill your barrel by dipping in alchohol and ice or use an aerosol freezing agent. Press the suppressor into place, using the appropriate PPE. When the temperatures normalize, the suppressor will be "permanently attached". To remove, locally heat the suppressor, chill the barrel with aerosol freezing agent and pull off. Obviously, you'll need to be careful in your measurement and positioning, as there will be no adjustment. You'll want to use a steel alloy flash hider or suppressor, so that it will expand and cool at the same rate as the barrel once in use.
 
Using this method would work well, but you would have to have Shoowrench's new barrel wrench to take off or tighten the barrel nut. Something to consider. Check the posts for his post.
 
tacticool22 said:
Or you could buy an engineered off the shelf thread adapter made for these rifles.
Click to expand...

i went this way because not sure of my intentions (mods) yet. very nice adapter, the fit and finish match up real well. quick shipping also. :cool:
 
They just slip over the muzzle and are held on with a fairly large set screw that is flush when tightened. The tip of the set screw does displace a little material on the barrel, but not bad.
The screw is placed so that if you do decide to thread the barrel at a later date, the mark will be machined away.
The divot is easily removed with a fine file, or even an emery board. Touch it up with some spot bluing and it disappears.
 
tacticool22 said:
They just slip over the muzzle and are held on with a fairly large set screw that is flush when tightened. The tip of the set screw does displace a little material on the barrel, but not bad.
The screw is placed so that if you do decide to thread the barrel at a later date, the mark will be machined away.
The divot is easily removed with a fine file, or even an emery board. Touch it up with some spot bluing and it disappears.
Click to expand...

Hate to keep bothering you but one more question. Will this have to be removed to use a barrel nut wrench?
 
bulldozerd8t said:
Hate to keep bothering you but one more question. Will this have to be removed to use a barrel nut wrench?
Click to expand...

Yes it will

You take it off using a allen wrench and then use the nut wrench (I believe)
Unless the nut wrench works with a flash hider on. But everything I have read says you must remove the flash hider

I have read that some guys are using Loctite or even JB weld.
I don't think that a good Idea.
 
Last edited:
bulldozerd8t said:
Hate to keep bothering you but one more question. Will this have to be removed to use a barrel nut wrench?
Click to expand...

Totally mis read the question, D'oh.
Yes, this will need to be removed to use any barrel nut wrench.
One of my wrenches (the one piece) will fit over a standard diameter FH. The other one (the wrench end) will not.
You can lock the set screw pretty tight, so you don't need any thread lock.
 
On the ones that have set screws, I wonder if a small piece of leather cut to fit in the set screw hole would keep it from marring the barrel?
 
VooDuuChild said:
On the ones that have set screws, I wonder if a small piece of leather cut to fit in the set screw hole would keep it from marring the barrel?
Click to expand...

It could "work" but you would not have the mechanical lock of steel on steel. The material displaced from the set screw tightening down is so little that with a little TLC and a bluing pen, at would all but disappear.
 
I think I am going to keep mine original, one less thing to take apart when tightening the barrel nut or when you remove the barrel. Also it would be hard to get set screw in same spot every time. In time the plain barrel might be a collector item.
 
That one is not an adapter. It is a one piece deal so you can't put any other flash hider or suppressor on it. If you never want to change barrel ends it should work fine. Don't know why they have multiple tiny set screws tho. All the pictures of their parts show them to be nicely machined. Are the parts made in the U.S. I can't find that info.
 
New Hidder

I have been informed that the maker of this flash hider is looking into a new style that has neither threads or screws. When I get that info I'll pass it on post haste. Tacticool22, you are right about this one. I don't know why it has the three screw, just the style I guess. I did see your adapter and I like it. I got the one in my photo free for doing photos for him on his site. I still may order yours for a better look in the future. Thanks for your posts in the forums. I enjoy them and your products.
 
I would love to see an affordable AND small size adapter.
I was going to go that route, but I could not justify thosands of parts and the many dollars to invest in a very cool adapter.
Thank you for the kind words kcmitch.
 
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